The search service can find package by either name (apache),
provides(webserver), absolute file names (/usr/bin/apache),
binaries (gprof) or shared libraries (libXm.so.2) in
standard path. It does not support multiple arguments yet...

The System and Arch are optional added filters, for example
System could be "redhat", "redhat-7.2", "mandrake" or "gnome",
Arch could be "i386" or "src", etc. depending on your system.

System
Arch

RPM resource apache-commons-logging

The commons-logging package provides a simple, component oriented
interface (org.apache.commons.logging.Log) together with wrappers for
logging systems. The user can choose at runtime which system they want
to use. In addition, a small number of basic implementations are
provided to allow users to use the package standalone.
commons-logging was heavily influenced by Avalon's Logkit and Log4J. The
commons-logging abstraction is meant to minimize the differences between
the two, and to allow a developer to not tie himself to a particular
logging implementation.